White flower from New Delhi, India

This a white flower. I am not sure of its name. This year it bloomed after many years. Its name is not known. Please enlighten me. I had thought it is Motia (in Urdu) or Sambac but it has no scent. Is does not look like Bela or Mogra.

These are the pictures with leaves:

Search on Google did not help. How little is posted on net or how inefficient the search engine are. It appears that they are caught in their own 'SEO'.